Module 16

Question 1

Which factors must be taken into consideration when determining the wire size to use for an aircraft installation?

Answer 1

Allowable power loss
Permissible voltage drop
Current carrying capacity of the conductor
type of load (continuous, or intermittent.)

Question 2

How does the routing of coaxial cables differ from the routing of electrical wiring?

Answer 2

Coaxial cables should be routed as directly as possible.

Question 3

In the American wire gauge system of numbers used to designate electrical wire sizes, the number assigned to a size is related to its?

Answer 3

Cross-sectional area

Question 4

The primary considerations when selecting electric cable size are?

Answer 4

current carrying capacity and allowable voltage drop

Question 5

What is the maximum amount of a time a circuit can be in operation and still be an intermittent-duty circuit?

Answer 5

two minutes

Question 6

Electrical wiring installed in aircraft without special enclosing means (open wiring) offers the advantages of ease of installation, simple maintenance and reduced weight. When bundling open wiring the bundles should?

Answer 6

be limited as to the number of cables to minimize damage from a single electrical fault

Question 7

What is the minimum bend radius for an electrical wire bundle?

Answer 7

ten times the outside diameter of the bundle

Question 8

When electric cables must pass through holes in bulkheads, formers, ribs, firewalls, etc., The wires should be protected from chafing by?

Answer 8

using a suitable grommet

Question 9

What considerations regarding fuel lines, temperature changes and support should be taken into account in the installation of aircraft wiring?

Answer 9

locate the bundle above flammable fluid lines and securely clamp to structure

Question 10

If a wire is installed so that it comes into contact with some moving parts, what protection should be given the wire?

Answer 10

pass through conduit

Question 11

what protection to wires and cables does conduit provide when used in aircraft installations?

Answer 11

mechanical

Question 12

The type of electric wire terminals used for most aircraft applications, in addition to providing good current carrying capabilities, are designated primarily?

Answer 12

to prevent circuit failure due to terminal disconnection

Question 13

Electric wire terminals for most aircraft applications must be what type?

Answer 13

ring

Question 14

For general electrical use in aircraft, the acceptable method of attaching a terminal to a wire is by

Answer 14

crimping

Question 15

What determines if the strength of a crimped terminal attachment is satisfactory?

Answer 15

when attaching a terminal to the end of an electric cable, it should be determined that the strength of the cable-to-terminal joint is at least equal to the tensile strength of the cable itself

Question 16

How should the splices be arranged if several are to be located in an electrical wire bundle?

Answer 16

staggered along the length of the bundle

Question 17

When approved spliced may be used to repair manufactured harnesses or installed wiring. The maximum number of splices permitted between any two connectors is?

Answer 17

one

Question 18

During inspection of the terminal strips of an aircraft electrical system, it should be determined that:

Answer 18

the terminal strips are anchored against rotation

Question 19

Aluminum wire must be stripped very carefully because?

Answer 19

individual strands will break easily after being nicked

Question 20

AN/MS electrical connectors are specifically designed to meet?

Answer 20

military specifications

Question 21

The most common method of attaching a pin or socket to an individual wire in an ms electrical connector is?

Answer 21

crimping

Question 22

The pin (male) section of an an/ms connector is normally installed on the ______________ side of a circuit.

Answer 22

the ground side of a circuit

Question 23

Bonding connections should be tested for:

Answer 23

resistance value

Question 24

When selecting hardware for attaching bonding connections to an aircraft structure which factors should be considered?

Answer 24

mechanical strength, ease of installation, amount of current to be carried

Question 25

Grounding is electrically connecting a conductive object to the primary structure. One purpose of grounding is to:

Answer 25

prevent development of radio frequency potentials